Cotton Fabrics Modified Using a Graft Copolymer From Commercial Precursors for Oil/Water Emulsion Separation
Loading...
Authors
Mah, Zac
Date
Type
thesis
Language
eng
Keyword
filtration , oil/water separation , Janus fabric , coatings , polymers , surfactants , stimuli-responsive polymers , surface chemistry
Alternative Title
Abstract
Graft copolymers of poly(ethylenimine) (PEI) and poly(dimethylsiloxane) (PDMS) were synthesized and used to coat cotton fabrics with the use of poly(ethylene glycol) diglycidyl ether as a crosslinker. The copolymer was applied to the fabrics via a CHCl3 solution, and secured on the surface by a network of epoxy-amine bonds between the PEI and crosslinker units. The coated fabrics were used to separate and recover oil from surfactant-stabilised, oil-in-water emulsions. The composition of the graft copolymer and obtained coating solutions was varied to determine the effects on separation performance and repeatability. Optimal oil flux and recovery was obtained from coatings composed of high molecular-weight PEI which contained a high percentage of grafted PDMS units. Highly-crosslinked coatings demonstrated repeatable and consistent separation performance, and were able to recover the vast majority of emulsified oil from hexadecane-in-water emulsions stabilized by sodium dodecyl sulfate (SDS). The de-emulsification properties of the optimized coatings may facilitate their use in wastewater remediation or oil recovery from contaminated environments.
Description
Citation
Publisher
License
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.